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EP0331233A2
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Method of manufacturing a laminated element and the element thus obtained
Assignee: Koninklijke Philips NV
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Filing: 1989-02-22
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Granted: —
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Expires: 2009-02-22
Abstract
Abstract A method of manufacturing a laminated element, in which a substrate 1 is provided with a coating 2 of a liquid-crystalline monomer, in accordance with formula 1, which is oriented by means of an external force, in particular a magnetic field 3, and subsequently subjected to radiation 4, so that a pattern 5 of coating 2 is polymerized and the orientation is fixed, as well as a laminated element, such as an optical component, obtained in accordance with the method.
Inventors
- 👤 Dirk Jan Broer
- 👤 Jan Van Der Veen
- 👤 Jan Boven
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:48
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1337; G11; G11B; G11B7/00; G11B7/24; G11B7/26; C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/138; G02F3/00; G03; G03F; G03F7/00; G03F7/0005; G03F7/001; G03F7/004; G03F7/027; G11B7/004; G11B7/0045; G11B7/241; G11B7/242; G11B7/244; G11B7/25; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
120 words
A method of manufacturing a laminated element having locally different properties, in which a substrate is provided with a coating having at least one patternwise defined section of a polymerized liquid-crystalline monomer, which monomer is first oriented by means of an external force and subsequently polymerized by means of irradiation, the direction of orientation being fixed, and a monomer which corresponds to the formula PBNQ (1) wherein P is a polymerizable group, B is a bridging group, N is a nematic or smectic liquid-crystalline group comprising at least a p-phenylene and/or cyclohexyl group, Q is a substituent of the mesogenic group N or the group BP, wherein B and P have the above-stated meaning, being used together with an initiator.
Claim 2
Independent Claim
120 words
A method of manufacturing a laminated element having locally different properties, in which a substrate is provided with a coating having at least one patternwise defined section of a polymerized liquid-crystalline monomer, which monomer is first oriented by means of an external force and subsequently polymerized by means of irradiation, the direction of orientation being fixed, and a monomer which corresponds to the formula PBNQ (1) wherein P is a polymerizable group, B is a bridging group, N is a nematic or smectic liquid-crystalline group comprising at least a p-phenylene and/or cyclohexyl group, Q is a substituent of the mesogenic group N or the group BP, wherein B and P have the above-stated meaning, being used together with an initiator.
Claim 3
Dependent Claim
37 words
A method as claimed in Claim 1, characterized in that the monomer corresponds to the formula wherein B and N have the meaning stated in Claim 1 and R is a hydrogen atom or a methyl group.
Claim 4
Dependent Claim
25 words
A method as claimed in Claim 2, characterized in that a monomer is used which is selected from one or more compounds of the formulae:
Claim 5
Dependent Claim
95 words
A method as claimed in Claim 1, 2 or 3, characterized in that a matrix whose surface has a structure which is the negative of the desired pattern is provided with the liquid-crystalline monomer, on which a substrate is provided, after which the monomer is oriented by an external force and polymerized by irradiation so that the direction of orientation is fixed and the substrate and the liquid-crystalline polymer layer connected thereto are removed from the matrix, the polymer layer having a defined pattern which is a reproduction (replica) of the surface of the matrix.
Claim 6
Dependent Claim
59 words
A method as claimed in Claim 1, 2 or 3, characterized in that a uniform layer of the liquid-crystalline monomer is applied to the substrate, the liquid-crystalline monomer is oriented by an external force and the layer is irradiated in accordance with a pattern, so that the orientation of the liquid-crystalline compound being fixed as a concequence of polymerization.
Claim 7
Dependent Claim
101 words
A method as claimed in Claim 5, - characterized in that a uniform layer of the liquid-crystalline monomer is applied to the substrate, the liquid-crystalline monomer is oriented by an external field of force, the layer is irradiated in accordance with a pattern so that the orientation of the liquid-crystalline monomer is fixed as a consequence of polymerization, subsequently the direction of the field of force is changed and the layer is irradiated again, such that the parts which were not irradiated in the first step are polymerized, the different orientation of the liquid-crystalline monomer present in these parts being fixed.
Claim 8
Dependent Claim
30 words
A method as claimed in Claim 6, characterized in that the direction of the field of force is changed such that it is oppositely directed relative to the initial direction.
Claim 9
Dependent Claim
64 words
A method as claimed in Claim 5, 6 or 7, characterized in that after irradiation the temperature of the layer of the liquid- crystalline monomer is increased such that the liquid-crystalline monomer in the unexposed portions of the layer is converted into the isotropic phase, and the layer is irradiated, so that the isotropic phase is fixed due to polymerization of the liquid-crystalline monomer.
Claim 10
Dependent Claim
63 words
A laminated element having locally different properties, which is manufactured by means of the method as claimed in any one of the preceding Claims 1 up to and including 8, characterized in that the element comprises a substrate and a coating having at least one patternwise defined section, which is composed of an oriented and radiation-polymerized liquid-crystalline monomer which corresponds to formula 1.
Claim 11
Dependent Claim
40 words
A laminated element as claimed in Claim 9, characterized in that the coating comprises the patternwise defined section(s) in which the liquid-crystalline polymer is present in the oriented configuration, and a remaining section which is present in an isotropic configuration.
Claim 12
Dependent Claim
19 words
A laminated element as claimed in Claim 9 or 10, characterized in that the coating comprises a dichroic dye.
Claim 13
Dependent Claim
26 words
A laminated element as claimed in Claim 9 or 10, characterized in that the patternwise defined section forms an information bit which can be read optically.
References Cited (Backward Citations)
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